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Nom G, OWEN TRUSS.

No. 345,170. Patented July 6, 1886;

UN TED STATES PATENT Genres.

THOMAS G. OWEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO ANDREW H. PARKER, OF SAME PLACE.

TRUSS.

LJIEGIFECATION farming part of Letters Patent NC. 3%5170, dated July 6, 1886.

\ Application tiled January :6, lSEG. Serial No. 189,784. (No model.)

To aZZ whom. it may concern.-

Be it known that I, THOMAS G. OWEN, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented a new and useful Im' provementin Trusses, of which the lbllowing is a full description, reference being had to the accompanying drawings, in which- Figure 1 is a plan. Fig. 2 is a side elevation. Fig. 3 is a central section. Fig. 4 is a detail, being a plan view of the arm and spring at their point ofjunction, the holding screw being removed. Fig. 5 is a detail, being a side elevation of the end of the arm which receives the spring. Fig. 6 isa detail, being a section through the lower part of the socket which receives the ball upon the end of the arm. Fig. 7 is a detail, being a top View of the lower partot' thesockct. and showing the two projections therein. Fig. 8 is an illustrative figure showing the common de vices used for adjusting the arm and the spring in different positions relatively to each other.

It is necessary to adjust trusses to many different positions, and it has been common to provide a ball and-socketjoint between the arm and ball of the truss, and also to provide two screws for the purpose of holding the ball in any desired position. It also has been common to make a joint between the arm which carries the ball and the spring of the truss, and means at such joint for adjusting the parts in difi'erent positions.

The objects of my invention are to provide improved devices for holding the ball in any desired position in its-socket, and for readily adjusting and holding the arm which carries the ball and the spring in different positions, which I accomplish as illustrated inthe drawings, and as hereinafter described.

In the drawings, Arepresents the pad of the truss,which is provided,as shown, with a plate, a, secured to its upper surface, which plate is provided with a socket, B, consisting of a depression, I), in the plate, and a piece, 0, secured to such plate, the depression I) entering a recess or hole made in the pad A.

d are two pins or points extending through the wall of the part b and a very short distance into the socket B.

as shown, is eight-sided.

O is the arm, having a ball, 6, upon one end, adapted to tit the socket B.

f is a set screw fitting a screw threaded hole in the wall of the part c and projecting through the same, so that its end comes in contact with the ball 0. By means of this screw f and the two points or projections 11 the-ball, when adjusted to any desired position, can be lirmly held in place. To readjust these parts, it is only necessary to loosen the one screw f. It will be observed that there are three holding-points, d cl, and the end of the screwf, all of which come in coir tact with the ball 6.. The points d are located below the plate a, and are entirely out of the way. The outer end of the arm 0 is provided with a raised projection, g, which, 'The projection and arm are provided with a screw-threaded hole.

D is the truss-spring, one end of which is provided with a many-sided hole adapted to lit over the projection g.

h is a screw, having a broad shoulder, 1', by

means of which the spring I) can be held upon the end of the arm 0 in any desired position.

To adjust the spring D relatively to the arm 0, it is only necessary to loosen the screw I1, so that the end of the spring can be lifted off from the projection 9. Then the position of the two parts can be changed as may be required, and when they have again been brought together they can be seen red by means of the screw h.

In Fig. 8 I have illustrated the device in common use for adjusting the spring and arm relatively to each other. In this figure, D represents a spring; E, a button provided with a number of holes, is, arranged in the arcof a circle, the button being riveted at the spring D. O is the arm, which is provided with a pin, Z, adapted to enter one of the holes k.

In order to get the proper adjustments, 'it is necessary to make the button E of considerable width, as shown in Fig. 8, which is not a desirable feature. 7

By means of the projection g and the many sided hole in the spring D, I dispense with the button E, and make a very much more compact device, which is less likely to be annoying in use, and at the same time furnish a very sided projection, g, the spring D, having at 10 strong, secure, and easily-adjusted joint beone end a hole corresponding with and fitting tween the two parts 0 and D. said projection, and a holding screw, h, hav- In Fig. 6, instead of two'pius d, I have shown ing a broad flange or shoulder, i, substantially 5 two indentations in the wall of the socket. as described.

What I claim as new, and desire to secure by Letters Patent, is

In a truss, the combination of the pad-arm 0, provided at one end with a lateral many- TI-IOMAS G. OWEN.

XVitnesses:

ALBERT H. ADAMS, HARRY '1. JONES. 

